/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/Character/CharacterGroundConstraint.h
This is the height below which the character is assumed to be on the ground and can apply force to move. This is useful if the character is slightly off the ground but should still be considered in a locomotion rather than falling state. If this number is set to zero then the constraint can only apply force to move to the motion target if the solver determines that there is a ground reaction force Input should be positive
void SetAssumedOnGroundHeight ( const [FReal](API\Runtime\ChaosCore\Chaos\FReal) & Value )